1 have a cube that was working ok.

I amended the mdx for one calculated member, reprocess and now all the
measures are showing empty. I have deleted the calculated member but all
measures are still empty.

I recreated a simple cube using come of the measures and dimension from the
existing cubes, but the new cube returns data.

Please help

A similar thing has happened to me and the cause was that I
inadvertently changed one of the hierarchies default member to be
something other than [All].
Another thing that caused a similar problem was setting aggregate to
false meaning that all was not created and the default member became
the 1st element in the dimension.
Hence when I queried the cube without specifying any member of the Date
hierarchy I got that element (which happened to be an accounting period
with no data)